Automatic advance for synchronizing gun control



Oct. 23, 1923. 1,471,359

H. o. RUSSELL ET AL AUTOMATIC ADVANCE FOR SYNCHRONIZING GUN CONTROLFiled March 2, 1922 ghvvc 1 1 TM,

Clllmucq Patented Oct. 23, 1923.

UNlTED STATES PATENT OFFICE.

HERBERT O. RUSSELL, 013' DETROIT, MICHIGAN, AND CHARLES LEIGH PAULUS,O1?

' DAYTON, OHIO.

AUTOMATIC ADVANCE FOR SYNCHRONIZING GUN CONTROL.

Application filed March 2, 1922. Serial No. 540,507.

To all whom it may concern:

Be it known that we, HERBERT O. RUSSELL and CHARLES LEIGH PAULUS,citizens of the United States, residing, respectively, at Detroit andDayton, in the counties of Wayne and Montgomery and States of Michiganand Ohio, have invented certain new and useful Improvements in AutomaticAdvance for Synchronizing Gun Control, of which 1 the following is aspecification.

This invention relates to an automatic advance for synchronized guncontrols, the object in view being to provide means for automaticallytiming the firing impulses in the r Nelson gun control to compensate forany increase or decrease in the rotational speed of the engine shaft inorder that the bullets will pass between the blades of the propeller andnot damage the same.

lVith the above and other objects in view, the invention consists in thenovel construe tion, combination and arrangement herein fully described,illustrated and claimed.

In the accompanying drawings; Figure 1 is a side elevation of thedevice. Figure 2 is a diame-trical section through the same.

Referring to the drawings, it will be seen that we divide the generatorshaft into two sections, 1 and 2, which are relatively adjustable in themanner hereinafter described. The shaft sections 1 and 2 areprovided'with spiral grooves or ways 3 and 4 and said grooves arereversely inclined with respect to each other as illustrated in Figure2. Surrounding the sections 1 and 2 of the generator shaft andoverlapping both sections is a sliding sleeve 5 which is normally heldin the position shown in Figures 1 and 2 by means of a coiled spring 8which encircles the sleeve and bears at one end against a. collar 8' onthe shaft section 2, said spring hearing at its upper end against acircumferential flange or annular shoulder 7 at the upper end of thesleeve 5.

The sleeve 5 has on its inner side pins or projections 6 and 7 whichengage the grooves 3 and 4 of the shaft sections 1 and 2 so that as thesleeve is moved longitudinally of the generator shaft. one of the shaftsections will be advanced or retarded relatively to the other sectionaccording to the direction,

of movement of said sleeve. The movement of the sleeve 5 is controlledby a centrifugal governor. This governor is shown as comprisingdiametrically opposite weighted arms 10 which are pivotally mounted at11 on section 1 of the generator shaft and said weighted arms areprovided with extension arms 12 which extend inwardly and bear againstthe sleeve 5 so that as the weighted governor arms swing outwardly asthe speed of rotation of the shaft increases, they bear downwardly uponthe sleeve 5 with the'result above stated.

By the mechanism above described the timing of the firing impulses inthe Nelson gun control is automatically increased in proportion to theincrease in the rotational speed of the engine shaft. In other words, asthe speed of the engine shaft increases, the lead of the firing impulsesis also increased, thereby preventing damage to the propeller blades.

Having thus described our invention, we claim:

1. In synchronizing gun control, a rotary impulse generator shaftembodying axially aligned sections having reversely inclined grooves.and a centrifugally controlled sleeve surrounding and slidable over theadjacent portions of the shaft sections and having projections operatingin the grooves thereof to vary the lead of one shaft section relativelyto the other,

2. In synchronizing gun control, a rotary impulse generator shaftembodying axially aligned sections having reversely inclined grooves,and a centrifugally controlled spring pressed sleeve surrounding andslidable over the adjacent portions of the shaft sections and havingprojections operating in the grooves thereof to vary the lead of oneshaft section relatively to the other.

3. In synchronizing gun control, a rotary impulse generator shaftembodying axially aligned sections having reversely inclined grooves,and a centrifugally controlled sleeve surrounding and slidable over theadjacent portions of the shaft sections and having means operating inthe grooves thereof to vary the lead of one shaft section relatively tothe other.

In testimony whereof we affix our signatures.

HERBERT O. RUSSELL. CHARLES LEIGH PAULUS

